Improvement in sand-screens



N, PETERS, PHOTO LTHDGRA WASHINGYDN D C @anni l (affita SAMUEL HO'LDSWORTH, 0F MASPETH', NEW YORK.

Letters Patent No. 112,809, dated March 21, 187.1.

IM PROVEMENT IN SAN-SCREENS.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom 'it may concern:

Be it .known that I, SAMUEL HoLDsWoRTH, of Maspeth, in the countyA of Queens and State of New York, have invented a new anduseful Improvement in Wire-Screens; and I do hereby declarel that the following is a full, clear, and exact description thereof, which will enable others skilled in the art tomake and use 'the same, reference being hadto the accompanying drawing forming part of this specification.

This invention relates to a'uew and useful improvemeut in Wire-screens for masons use in screening sand, and also for screening grain and coal, and for all pur- .poses for which it is adapted;` and p It consists in forming a series of offsets in the screenwire, and in placing the tie or transverse. wires in the angles formed. by the o'sets, by means of which iin-- provements the operation of screening is greatly facilitated andthe screen rendered more durable than screens constructed in the ordinarymanuer, as will be hereinafter more fully described.-

In the accompanying drawing Figure 1 represents a longitudinal section of the screen, showin g the offsets and the position of the ties, the section being on the line x a: of fig. 2.

Figure 2 is a top view.

Similar letters of reference indicate corresponding parts.

A is the trame or box in which the screen-wire is confined.

screen, (more or less in uumber,) and of any desired angle and extent of fall.

D represents the ties, which are'woven or twisted over or around the wire so as to keep the wires in place and parallel with each other. It will beobserved that these ties are placed in the angles of the olisets..

Screens are usually made with straight wires, with the ties projecting upward, and in screening it is usual for the operator to frequently draw his shovel downV on the. screen to disengage the particles which lodge. against the ties. rI hisoperation soon wears out the ties, the wires become loosened, and the screen rendered useless until repaired.

By my improvement 4the article screened receives an impetus at each offset, aud is not liable to lodge onthe ties, while the ties are shielded from harm by the angle or oliset should the shovel be scraped down on the face ofthe screen in the usual manner.

By means of .the offsets O the4 screen' is rendered twice as durable as it would be without them, while the operation of screening is more perfectly and expeditiously performed.

Having thus described my invention,

I claim as new and desire to secureI by; Letters Patent- A Wire-screen constructed with offsets, substantially as seen at C, and provided with the ties D in the angle formed thereby, substantially as and for the purposes herein described.

SAMUEL HOLDSWORTH.

Witnesses:

ALEX. F. ROBERTS,

T. B. MosHER. 

